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A method is presented for designing an equalization filter for a sound-reproduction system by adjusting the filter coefficients to minimize the sum of the square of the errors between the equalized responses at multiple points in the room and delayed versions of the original electrical signal. Such an equalization filter can give a more uniform frequency response over a greater volume of the enclosure than a filter designed to equalize at one point only. The results of computer simulations are presented for equalization in a "room" with dimensions and acoustic damping typical of a car interior, using various algorithms to adapt automatically the coefficients of a digital equalization filter.
Author (s): Elliott, Stephen J.; Nelson, Philip A.
Affiliation:
Institute of Sound and Vibration Research, University of Southampton, Southampton, UK
(See document for exact affiliation information.)
Publication Date:
1989-11-06
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Permalink: https://aes2.org/publications/elibrary-page/?id=6063
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Elliott, Stephen J.; Nelson, Philip A.; 1989; Multiple-Point Equalization in a Room Using Adaptive Digital Filters [PDF]; Institute of Sound and Vibration Research, University of Southampton, Southampton, UK; Paper ; Available from: https://aes2.org/publications/elibrary-page/?id=6063
Elliott, Stephen J.; Nelson, Philip A.; Multiple-Point Equalization in a Room Using Adaptive Digital Filters [PDF]; Institute of Sound and Vibration Research, University of Southampton, Southampton, UK; Paper ; 1989 Available: https://aes2.org/publications/elibrary-page/?id=6063
@article{elliott1989multiple-point,
author={elliott stephen j. and nelson philip a.},
journal={journal of the audio engineering society},
title={multiple-point equalization in a room using adaptive digital filters},
year={1989},
volume={37},
issue={11},
pages={899-907},
month={november},}